.div1 {
	width: 200px;
	height: 100px;
	border: 1px #CCCCCC solid;
	background-color: red;
	position: relative;
}
.div3 {
	width: 100%;
	height: 50px;
	position: absolute;
	bottom: 0;
	left: 0;
	background: rgba(0,0,0,0.5);
}

.div3 p {
	color: white;
}
